Year	Percent
1993	3.07
1994	3.22
1998	2.85
1999	3.62
2001	4.48
2002	6.97
2003	4.58
2004	4.79
2005	3.15
2006	3.43
2007	2.85
2008	2.79
2009	3.35
2010	2.62
2011	2.62
2012	2.37
2013	3.03
2014	3.56
2015	2.94
2016	3.66
2017	3.03
2018	4.14
2019	4.6
2020	5.67